Use of GIS in prediction of soil electrical conductivity for water management against soil salinity

Tomoko Nakagawa, Kiyoshi Torii, Takeo Akae, Yasutaka Kihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

On Kawauchi Region on mouth of Yoshino River in Japan, which used to be a wetland, farm land has been developed by land reclamation. In this region, rice, lotus root and sweet potato are mainly cultivated. However because of the high salt concentration in groundwater due to seawater intrusion, crops are subjected to damage by salt. Especially in the paddy fields and lotus fields, salinity damage could be serious because of the fine texture of the soil and flooding surplus water for salt removal is practiced. To establish the most efficient management of irrigation water, water demand including water for salt removal has to be known. So in this study, we investigated the possibility of salinity damage in the fields by the measurement of electrical conductivity (EC) at a number of points that were considered to be critical for water quality management and the spatial distribution of EC was predicted with geostatistical analysis. The EC value in the groundwater was high in the area near the riparian and, in such areas surplus water for the salt removal was considered necessary. On the other hand, there were areas in paddy fields and lotus fields where the EC in the surface water was high regardless of the distance from the river. In such areas, irrigation water might contain salt and management of irrigation water had to be improved. By linking the prediction values of EC with the database of each plot, it is possible to propose methods for efficient water management and effective quality control of crops in a form that is easily understood by farmers.

Original languageEnglish
Title of host publicationAsian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005
Pages372-380
Number of pages9
Publication statusPublished - 2005
Event26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC - Ha Noi, Viet Nam
Duration: Nov 7 2005Nov 11 2005

Publication series

NameAsian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005
Volume1

Other

Other26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC
CountryViet Nam
CityHa Noi
Period11/7/0511/11/05

Keywords

  • Deterioration of agriculture fields
  • Geostatistical analysis
  • Irrigation water
  • Salinity

ASJC Scopus subject areas

  • Aerospace Engineering

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  • Cite this

    Nakagawa, T., Torii, K., Akae, T., & Kihara, Y. (2005). Use of GIS in prediction of soil electrical conductivity for water management against soil salinity. In Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005 (pp. 372-380). (Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005; Vol. 1).